Wacker Neuson built these 290 pages (OEM #1000282523) for one compact track excavator family: the ET18, ET20, ET24, E12-02, and E12-03. Hydraulic coverage runs deep, with per-model schematics, 3rd control circuit diagrams for each variant, pilot valve procedures, and pump teardown through reassembly. The technical data section holds compound spec tables, tightening torques for both engine generations, and electrical component listings; wiring diagrams trace every harness from the engine and chassis through each cabin option. Torque your swivel joint fasteners to 64 Nm (47 ft-lbs.) and keep hydraulic hose replacement on a firm six-year clock. Machine down, dealer three weeks out: open this PDF on your tablet and search the spec you need before the coffee cools.
What's Inside This Wacker Neuson ET18 & variants Manual
| System | Pages | Key Topics |
|---|---|---|
| Operation | 12-41 | Information on This Service Manual, Identification of Warnings and Dangers, Explanation of Symbols and Abbreviations (Conversion Table), Designated Use and Exemption From Liability |
| Technical Data | 42-59 | Models and Trade Names, Engine, Engine Capacities, Traveling drive/axles, Tires/tracks (Rubber Tracks), Fuel Injection Pump, Coolant, Compound Table |
| Maintenance | 60-131 | Information on Maintenance (Responsibilities and Prerequisites, Important Safety Instructions on Maintenance), Service Package |
| Engine | 132-167 | Engine 3TNV76-SNSE12, Checking and Adjusting Valve Clearance, Tightening Order for Cylinder Head Bolts |
| Hydraulic System | 168-205 | Hydraulic Pump, Summation Control P1 – P3, Exploded View of Hydraulic Pump, Pilot Oil Supply Unit, Dismantling the Hydraulic Pump, Assembling the Hydraulic Pump, Main Valve Block |
| Electrical System | 206-251 | Ohm's Law; Power, Measuring Equipment, Measuring Methods, Relays (Use, Mode of Function), Electric Units, Fuses/relays, Alternator, Starter |
| Options | 252-271 | Automatic Engine Speed Setting, Grab Control Circuit, Hydraulic Easy Lock Quickhitch (Hydraulic Quickhitch Pressure Variants), 3Rd Control Circuit (Function) |
| PowerTilt PTS4.5 | 272-290 | Checking the Product, Decompression Valve, Testing the Hydraulic System of the Machine, Specifications/requirements, Tools (Making a Tool for Removing the Seals) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| ET18, ET20, ET24 | ||
| Swivel joint torque | 64 Nm (47 ft.lbs.) | p. 200 |
| All Models | ||
| Hydraulic hose replacement interval | every 6 years | p. 114 |
| Joint rod maximum wear tolerance | 5 % (max. tolerance) | p. 123 |
| Air filter replacement interval | every 1000 o/h or once a year at the latest | p. 66 |
| Hydraulic oil filter insert replacement interval (normal work) | first time after 50 o/h, then every 500 o/h | p. 62 |
| Pressure drop for variable displacement pump P1 (diagnostic limit) | not more than 10 % of the maximum value | p. 102 |
| Pressure drop for variable displacement pump P2 (diagnostic limit) | not more than 10 % of the maximum value | p. 103 |
| Engine Power | 13.4 kW at 2200 rpm (18 hp at 2200 rpm) | p. 43 |
| Engine Idling Speed | 1300 +/− 25 rpm | p. 43 |
| PowerTilt PTS4.5 | ||
| PowerTilt minimum hose/pipe size | 6 mm (0.23 in) | p. 274 |
| ET18 – ET24 | ||
| Joint rod nominal size A | 32 mm (1 1/4 in) | p. 123 |
| all (from 2012 engine) | ||
| Engine Displacement | 1266 cm³ (77.3 in³) | p. 43 |
Wacker Neuson ET18 & variants Common Problems This Manual Covers
Wacker Neuson ET18 ET20 ET24 engine turns over slowly or fails to start in cold weather p. 164
Test the battery against the 12 V 44 Ah rating on page 47. Inspect the cable connections, starting relay, and glow plugs. Drain water from the fuel system and swap a clogged fuel filter. Confirm the fuel grade is correct.
Manual Section: Engine does not start or is not easy to startNo hydraulic movement or very weak boom arm bucket response after initial machine startup p. 102
Verify the hydraulic tank holds its 34 l (9 gal) system fill, detailed on page 45. Check for trapped air or low oil. Measure the variable displacement pump P1 pressure drop; it should stay within 10 % of the maximum value on page 102.
Manual Section: 3.17 Pressure checkPowerTilt PTS4.5 attachment slowly drifts and does not maintain its position during grading operation p. 287
Inspect the control valve and decompression valve for escaping oil. Trace the hydraulic lines and confirm the total swivel angle stays within 180 degrees, shown on page 274. Replace damaged seals with the correct removal tool, then test the system for pressure holding.
Manual Section: 9.12 TroubleshootingEngine overheats rapidly and the temperature warning system responds during heavy load operations p. 152
Scan the cooling system for leaks and confirm the coolant pump runs. Inspect the thermostat, radiator, and fan V-belt. Torque the cylinder head bolts to 59 to 63 Nm (43.5 to 46.5 ft.lbs.) on the second pass, per page 152.
Manual Section: Engine overheats, temperature warning system respondsFrequently Asked Questions
How do I reset the Wacker Neuson ET18/ET20/ET24 control system?
Resetting runs through the maintenance meter on the control system. Select it with switch A, press switch B, then key in the factory code (12345) one digit at a time, confirming each with switch B. Enter it correctly and the meter drops back to 500 o/h.
How do I reset the service interval on a Wacker Neuson mini excavator?
The service interval lives in the maintenance meter. Select the meter with switch A and press switch B, then enter the factory-set code (12345) digit by digit, confirming each with switch B. Once accepted, the meter resets to 500 operating hours.
What do I get after purchasing this Wacker Neuson ET18 & variants manual?
Instant PDF download. The full 290-page searchable Service Manual lands in your account right after payment. Open it on a laptop, tablet, or phone out in the shop.
Can I print this manual?
The PDF is DRM-free, so print whatever sections you want to carry out to the shop. Standard letter or A4 paper works fine.
Are hydraulic system diagrams in this Wacker Neuson ET18 & variants manual?
Yes. It includes hydraulic system diagrams, circuit schematics, and component specifications for the ET18 and its variants.
Document Quality
This is a high-quality, native digital PDF document, allowing you to search and copy the full text content. All text is crisp and easy to read throughout the manual. Diagrams and illustrations are a mix of sharp vector drawings and clear raster images or photos, with all labels remaining perfectly readable. The pages are clean with no scan artifacts, stains, marks, or skewed content. There is one blank filler page (page 10) at the beginning of a section.
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